What makes a web tool Web 2.0?

Example Web 2.0 Tools

Pick from one of the tools below (or choose your own) for our activity today
Glogster - Group 1
Voicethread - Group 3
Wallwisher or Linoit - Group 9
Wordle or Tagxedo - Group 6
Cover it Live - or Chatzy
Edublogs -
Xtranormal - group 5
Google Maps - or Google Earth
Tiki-Toki Timeline or X-Timeline - Group 4
bubbl.us mindmap - Group 8
SpicyNodes - Group 2
Storybird - Group 7